Cigarette-making machines



Filed Jan. 16, 1961 mam/7'02 .lflllallllllllll United States Patent3,105,498 CIGARETTE-MAKE G MACWES Cyrri Best, Deptford, London, England,assignor to Mohns Machine Company Limited, a British company Fiied Jan.16, 1961, Ser. No. 82,947 Claims priority, application Great BritainSian. 27, 1966 1 Claim. (Cl. Hal-66) This invention concernsimprovements in cigarettemaking machines and particularly that part of acontinuous-rod cigarettemraking machine which is known as the garniture.

The 'garniture comprises that part of the machine in which thecontinuous web of cigarette paper is folded around the tobacco filler toform a rod. It is well-known that during the folding operations tobaccodust or fine particles of tobacco tend to be deposited upon the variousparts of the garniture and is well-known to provide suction devices forremoving this dust.

The cigarette paper is first folded around the tobacco filler into analmost circular form with one upstanding portion to which paste isapplied to seal the rod. It is sometimes found that fragments of tobaccoare deposited on this upstanding part and when it is folded down to sealthe rod these tobacco fragments are trapped between surfaces of the lapand give the cigarette an undesirable appearance.

The object of the invention is to provide improved suction devices fordust removal and in particular to prevent tobacco fragments from beingdeposited on the upstanding part of the paper and the cooperatinghorizontal part which together constitute the lap, and eventually comingto lie between the paper surfaces of the lap.

According to the invention there is provided a dust suction device forthe garniture of a continuous rod cigarette making machine having apasting device for joining the margins of the web to provide a lap and adust exhaust system, said device comprising a hood mounted on agarniture at a position where it is located above the partly wrapped rodjust before the latter passes to the pasting device of the machine atwhich position the paper web is folded around about three-quarters ofthe circumference of the rod and so that one margin of the paper is overthe top part of the rod while the other margin is at the top of asubstantially vertical upstanding part of the web, said hood beingconnected to the exhaust system and shaped to admit air so as to flow"across the first said margin of the paper web and impinge on theupstanding part of the paper web and fiow upwards over the surfacethereof whereby any tobacco fragments which may have settled on saidupstanding part or the other margin are drawn away therefrom and carriedinto the exhaust system of the machine.

The device may further comprise ducts positioned near pars of thegarniture preceding the position where the hood is mounted and connectedto the exhaust system in order to remove dust from said parts of thegarniture.

The invention will be described with reference to the accompanyingdrawings, in which:

FIGURE 1 is a plan, partly in section, of part of a garniture of acontinuous-rod cigarette-making machine,

FIGURE 2 is a view of a fragment of FIGURE -l, partly cut away to showthe interior of a suction device,

FIGURE 3 is a section of FIGURE 1 on the line 33.

3,105,498 Patented Oct. 1, 1963 ice Referring to FIGURE 1, the garniturecomprises a grooved block or base 1 having a :groove 2 which convergesas shown, the bottom of the groove being of arcuate shape. Mounted uponthe block 1 are a number of plates or blocks described below andconstituting folders whereby the cigarette paper is gradually foldedover to the circular shape. During the initial stages of this processthe tobacco is isolated from the overhanging paper as it is folded, by atapering arcuate member 3, known as the tongue, which is supported fromabove by a rib 4 which is shown in section. The aforesaid platescomprise one long plate 5 on one side of the converging groove andcooperating plates 6, 7 and 8 on the other side, and it will be seenthat at the time the rod reaches a position near the section line 33 thepaper has been folded in the manner clearly shown in FIGURE 3 so as toleave one upstanding part to which paste is later applied by a pastewheel 9 cooperating with a presser wheel 10. During this pastingoperation the paper is controlled by another folder 11 and shortlyafterwards the rod passes between plates 12 and 13 to complete thewrapping, and which, together with the block 1, define a hole usuallycircular, which completely surrounds the wrapped rod. In order tocontrol the paper as accurately as possible, the plate 11 has anextension 14 extending very closely towards the beginning of the saidcircular hole.

Dust or fragments of tobacco will naturally accumulate on the tongue 3and the plates 5, 6, 7 and 8 and to remove as much of this as possiblethe plate 7 has a thin slot (not shown) formed in the side nearer thetongue, through which much of this dust is sucked to pass through a duct15 leading to the exhaust system of the machine. In the same Way dust atthe other side of the tongue is picked up by a nozzle '16 leading to aduct 17 through which the dust is conveyed to the exhaust system. Theparts near the end of the tongue are covered by a hood 18, which is bestseen in FIGURE 3, and as this communicates through a curved pipe 19 withthe nozzle 16, any dust picked up in the hood will be drawn into theexhaust system. The path of the air will be as indicated by the arrowsin FIGURE 3, from which it will be seen that the air flows over thehorizontal part of the lap and carries away any dust and after impingingon the vertical part of the lap it will rfiow upwards, thus carryingaway any dust deposited on said vertical part. In other words thegarniture and associated parts are kept free of dust and in particularthe margins of the web which eventually constitute the paper lap, thatis, the vertical and upper curved parts shown in FIGURE 3 are swept freeof any dust because of the air current passing across them in the mannershown.

What I claim as my invention and desire to secure by Letters Patent is:

A dust suction device for the garniture of a continuous rodcigarettemaking machine having a pasting device for joining the marginsof the web to provide a lap, and a dust exhaust system, said suctiondevice comprising a hood mounted on the garniture at a position where itis located above the partly wrapped rod just before the latter passes tothe pasting device of the machine, at which position the paper web isfolded around about threequarters of the circumference of the rod and sothat one margin of the paper is over the top part of the rod while theother margin is at the top of a substantially vertical upstanding partof the Web, said hood being connected to the exhaust system on that sideof the rod having said upstanding part of the web and having a top andtwo side walls, one of said side Walls having an air inlet aperture onthat side of the partly Wrapped rod opposite from said upstanding .partof the eb to admit air and to cause such air to flow across the surfaceof the first said margin of the paper web substantially at right anglesto the edge of said margin and impinge on the upstanding part of thepaper Web and flow upward over the surface thereof 10 whereby anytobacco fragments which may have settled on said upstanding part or theother margin are drawn 4 away therefrom and carried into the exhaustsystem of the machine.

References Cited in the file of this patent UNITED STATES PATENTS1,907,587 Rundell May 9, 1933 2,363,225 Ruau et a1 Nov. 7, 1944 FOREIGNPATENTS 544,597 Great Britain Apr. 20, 1942 620,441 Great Britain Mar.24, 1949

